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2324 lines
80 KiB
HTML
2324 lines
80 KiB
HTML
7 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>JSDoc: Source: display/api.js</title>
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<script src="scripts/prettify/prettify.js"> </script>
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<script src="scripts/prettify/lang-css.js"> </script>
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<!--[if lt IE 9]>
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<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
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<![endif]-->
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<link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
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<link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
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</head>
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<body>
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<div id="main">
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<h1 class="page-title">Source: display/api.js</h1>
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<section>
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<article>
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<pre class="prettyprint source linenums"><code>/* Copyright 2012 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
|
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|
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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|
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*
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* Unless required by applicable law or agreed to in writing, software
|
||
|
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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|
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* See the License for the specific language governing permissions and
|
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|
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* limitations under the License.
|
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|
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*/
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|
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/* globals requirejs, __pdfjsdev_webpack__ */
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import {
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||
|
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createPromiseCapability, deprecated, error, getVerbosityLevel, globalScope,
|
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|
|
info, InvalidPDFException, isArray, isArrayBuffer, isInt, isSameOrigin,
|
||
|
|
loadJpegStream, MessageHandler, MissingPDFException, NativeImageDecoding,
|
||
|
|
PageViewport, PasswordException, StatTimer, stringToBytes,
|
||
|
|
UnexpectedResponseException, UnknownErrorException, Util, warn
|
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|
|
} from '../shared/util';
|
||
|
|
import {
|
||
|
|
DOMCanvasFactory, DOMCMapReaderFactory, getDefaultSetting,
|
||
|
|
RenderingCancelledException
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||
|
|
} from './dom_utils';
|
||
|
|
import { FontFaceObject, FontLoader } from './font_loader';
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||
|
|
import { CanvasGraphics } from './canvas';
|
||
|
|
import { Metadata } from './metadata';
|
||
|
|
|
||
|
|
var DEFAULT_RANGE_CHUNK_SIZE = 65536; // 2^16 = 65536
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|
|
|
||
|
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var isWorkerDisabled = false;
|
||
|
|
var workerSrc;
|
||
|
|
var isPostMessageTransfersDisabled = false;
|
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|
|
|
||
|
|
var pdfjsFilePath =
|
||
|
|
typeof PDFJSDev !== 'undefined' &&
|
||
|
|
PDFJSDev.test('PRODUCTION && !(MOZCENTRAL || FIREFOX)') &&
|
||
|
|
typeof document !== 'undefined' && document.currentScript ?
|
||
|
|
document.currentScript.src : null;
|
||
|
|
|
||
|
|
var fakeWorkerFilesLoader = null;
|
||
|
|
var useRequireEnsure = false;
|
||
|
|
// The if below protected by __pdfjsdev_webpack__ check from webpack parsing.
|
||
|
|
if (typeof PDFJSDev !== 'undefined' &&
|
||
|
|
PDFJSDev.test('GENERIC && !SINGLE_FILE') &&
|
||
|
|
typeof __pdfjsdev_webpack__ === 'undefined') {
|
||
|
|
// For GENERIC build we need add support of different fake file loaders
|
||
|
|
// for different frameworks.
|
||
|
|
if (typeof window === 'undefined') {
|
||
|
|
// node.js - disable worker and set require.ensure.
|
||
|
|
isWorkerDisabled = true;
|
||
|
|
if (typeof require.ensure === 'undefined') {
|
||
|
|
require.ensure = require('node-ensure');
|
||
|
|
}
|
||
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|
useRequireEnsure = true;
|
||
|
|
} else if (typeof require !== 'undefined' &&
|
||
|
|
typeof require.ensure === 'function') {
|
||
|
|
useRequireEnsure = true;
|
||
|
|
}
|
||
|
|
if (typeof requirejs !== 'undefined' && requirejs.toUrl) {
|
||
|
|
workerSrc = requirejs.toUrl('pdfjs-dist/build/pdf.worker.js');
|
||
|
|
}
|
||
|
|
var dynamicLoaderSupported =
|
||
|
|
typeof requirejs !== 'undefined' && requirejs.load;
|
||
|
|
fakeWorkerFilesLoader = useRequireEnsure ? (function (callback) {
|
||
|
|
require.ensure([], function () {
|
||
|
|
var worker;
|
||
|
|
if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('LIB')) {
|
||
|
|
worker = require('../pdf.worker.js');
|
||
|
|
} else {
|
||
|
|
worker = require('./pdf.worker.js');
|
||
|
|
}
|
||
|
|
callback(worker.WorkerMessageHandler);
|
||
|
|
});
|
||
|
|
}) : dynamicLoaderSupported ? (function (callback) {
|
||
|
|
requirejs(['pdfjs-dist/build/pdf.worker'], function (worker) {
|
||
|
|
callback(worker.WorkerMessageHandler);
|
||
|
|
});
|
||
|
|
}) : null;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Document initialization / loading parameters object.
|
||
|
|
*
|
||
|
|
* @typedef {Object} DocumentInitParameters
|
||
|
|
* @property {string} url - The URL of the PDF.
|
||
|
|
* @property {TypedArray|Array|string} data - Binary PDF data. Use typed arrays
|
||
|
|
* (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded,
|
||
|
|
* use atob() to convert it to a binary string first.
|
||
|
|
* @property {Object} httpHeaders - Basic authentication headers.
|
||
|
|
* @property {boolean} withCredentials - Indicates whether or not cross-site
|
||
|
|
* Access-Control requests should be made using credentials such as cookies
|
||
|
|
* or authorization headers. The default is false.
|
||
|
|
* @property {string} password - For decrypting password-protected PDFs.
|
||
|
|
* @property {TypedArray} initialData - A typed array with the first portion or
|
||
|
|
* all of the pdf data. Used by the extension since some data is already
|
||
|
|
* loaded before the switch to range requests.
|
||
|
|
* @property {number} length - The PDF file length. It's used for progress
|
||
|
|
* reports and range requests operations.
|
||
|
|
* @property {PDFDataRangeTransport} range
|
||
|
|
* @property {number} rangeChunkSize - Optional parameter to specify
|
||
|
|
* maximum number of bytes fetched per range request. The default value is
|
||
|
|
* 2^16 = 65536.
|
||
|
|
* @property {PDFWorker} worker - The worker that will be used for the loading
|
||
|
|
* and parsing of the PDF data.
|
||
|
|
* @property {string} docBaseUrl - (optional) The base URL of the document,
|
||
|
|
* used when attempting to recover valid absolute URLs for annotations, and
|
||
|
|
* outline items, that (incorrectly) only specify relative URLs.
|
||
|
|
* @property {boolean} disableNativeImageDecoder - (deprecated) Disable decoding
|
||
|
|
* of certain (simple) JPEG images in the browser. This is useful for
|
||
|
|
* environments without DOM image support, such as e.g. Node.js.
|
||
|
|
* The default value is `false`.
|
||
|
|
* @property {string} nativeImageDecoderSupport - (optional) Strategy for
|
||
|
|
* decoding certain (simple) JPEG images in the browser. This is useful for
|
||
|
|
* environments without DOM image and canvas support, such as e.g. Node.js.
|
||
|
|
* Valid values are 'decode', 'display' or 'none'; where 'decode' is intended
|
||
|
|
* for browsers with full image/canvas support, 'display' for environments
|
||
|
|
* with limited image support through stubs (useful for SVG conversion),
|
||
|
|
* and 'none' where JPEG images will be decoded entirely by PDF.js.
|
||
|
|
* The default value is 'decode'.
|
||
|
|
* @property {Object} CMapReaderFactory - (optional) The factory that will be
|
||
|
|
* used when reading built-in CMap files. Providing a custom factory is useful
|
||
|
|
* for environments without `XMLHttpRequest` support, such as e.g. Node.js.
|
||
|
|
* The default value is {DOMCMapReaderFactory}.
|
||
|
|
* @property {boolean} stopAtErrors - (optional) Reject certain promises, e.g.
|
||
|
|
* `getOperatorList`, `getTextContent`, and `RenderTask`, when the associated
|
||
|
|
* PDF data cannot be successfully parsed, instead of attempting to recover
|
||
|
|
* whatever possible of the data. The default value is `false`.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @typedef {Object} PDFDocumentStats
|
||
|
|
* @property {Array} streamTypes - Used stream types in the document (an item
|
||
|
|
* is set to true if specific stream ID was used in the document).
|
||
|
|
* @property {Array} fontTypes - Used font type in the document (an item is set
|
||
|
|
* to true if specific font ID was used in the document).
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This is the main entry point for loading a PDF and interacting with it.
|
||
|
|
* NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)
|
||
|
|
* is used, which means it must follow the same origin rules that any XHR does
|
||
|
|
* e.g. No cross domain requests without CORS.
|
||
|
|
*
|
||
|
|
* @param {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src
|
||
|
|
* Can be a url to where a PDF is located, a typed array (Uint8Array)
|
||
|
|
* already populated with data or parameter object.
|
||
|
|
*
|
||
|
|
* @param {PDFDataRangeTransport} pdfDataRangeTransport (deprecated) It is used
|
||
|
|
* if you want to manually serve range requests for data in the PDF.
|
||
|
|
*
|
||
|
|
* @param {function} passwordCallback (deprecated) It is used to request a
|
||
|
|
* password if wrong or no password was provided. The callback receives two
|
||
|
|
* parameters: function that needs to be called with new password and reason
|
||
|
|
* (see {PasswordResponses}).
|
||
|
|
*
|
||
|
|
* @param {function} progressCallback (deprecated) It is used to be able to
|
||
|
|
* monitor the loading progress of the PDF file (necessary to implement e.g.
|
||
|
|
* a loading bar). The callback receives an {Object} with the properties:
|
||
|
|
* {number} loaded and {number} total.
|
||
|
|
*
|
||
|
|
* @return {PDFDocumentLoadingTask}
|
||
|
|
*/
|
||
|
|
function getDocument(src, pdfDataRangeTransport,
|
||
|
|
passwordCallback, progressCallback) {
|
||
|
|
var task = new PDFDocumentLoadingTask();
|
||
|
|
|
||
|
|
// Support of the obsolete arguments (for compatibility with API v1.0)
|
||
|
|
if (arguments.length > 1) {
|
||
|
|
deprecated('getDocument is called with pdfDataRangeTransport, ' +
|
||
|
|
'passwordCallback or progressCallback argument');
|
||
|
|
}
|
||
|
|
if (pdfDataRangeTransport) {
|
||
|
|
if (!(pdfDataRangeTransport instanceof PDFDataRangeTransport)) {
|
||
|
|
// Not a PDFDataRangeTransport instance, trying to add missing properties.
|
||
|
|
pdfDataRangeTransport = Object.create(pdfDataRangeTransport);
|
||
|
|
pdfDataRangeTransport.length = src.length;
|
||
|
|
pdfDataRangeTransport.initialData = src.initialData;
|
||
|
|
if (!pdfDataRangeTransport.abort) {
|
||
|
|
pdfDataRangeTransport.abort = function () {};
|
||
|
|
}
|
||
|
|
}
|
||
|
|
src = Object.create(src);
|
||
|
|
src.range = pdfDataRangeTransport;
|
||
|
|
}
|
||
|
|
task.onPassword = passwordCallback || null;
|
||
|
|
task.onProgress = progressCallback || null;
|
||
|
|
|
||
|
|
var source;
|
||
|
|
if (typeof src === 'string') {
|
||
|
|
source = { url: src, };
|
||
|
|
} else if (isArrayBuffer(src)) {
|
||
|
|
source = { data: src, };
|
||
|
|
} else if (src instanceof PDFDataRangeTransport) {
|
||
|
|
source = { range: src, };
|
||
|
|
} else {
|
||
|
|
if (typeof src !== 'object') {
|
||
|
|
error('Invalid parameter in getDocument, need either Uint8Array, ' +
|
||
|
|
'string or a parameter object');
|
||
|
|
}
|
||
|
|
if (!src.url && !src.data && !src.range) {
|
||
|
|
error('Invalid parameter object: need either .data, .range or .url');
|
||
|
|
}
|
||
|
|
|
||
|
|
source = src;
|
||
|
|
}
|
||
|
|
|
||
|
|
var params = {};
|
||
|
|
var rangeTransport = null;
|
||
|
|
var worker = null;
|
||
|
|
for (var key in source) {
|
||
|
|
if (key === 'url' && typeof window !== 'undefined') {
|
||
|
|
// The full path is required in the 'url' field.
|
||
|
|
params[key] = new URL(source[key], window.location).href;
|
||
|
|
continue;
|
||
|
|
} else if (key === 'range') {
|
||
|
|
rangeTransport = source[key];
|
||
|
|
continue;
|
||
|
|
} else if (key === 'worker') {
|
||
|
|
worker = source[key];
|
||
|
|
continue;
|
||
|
|
} else if (key === 'data' && !(source[key] instanceof Uint8Array)) {
|
||
|
|
// Converting string or array-like data to Uint8Array.
|
||
|
|
var pdfBytes = source[key];
|
||
|
|
if (typeof pdfBytes === 'string') {
|
||
|
|
params[key] = stringToBytes(pdfBytes);
|
||
|
|
} else if (typeof pdfBytes === 'object' && pdfBytes !== null &&
|
||
|
|
!isNaN(pdfBytes.length)) {
|
||
|
|
params[key] = new Uint8Array(pdfBytes);
|
||
|
|
} else if (isArrayBuffer(pdfBytes)) {
|
||
|
|
params[key] = new Uint8Array(pdfBytes);
|
||
|
|
} else {
|
||
|
|
error('Invalid PDF binary data: either typed array, string or ' +
|
||
|
|
'array-like object is expected in the data property.');
|
||
|
|
}
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
params[key] = source[key];
|
||
|
|
}
|
||
|
|
|
||
|
|
params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE;
|
||
|
|
params.ignoreErrors = params.stopAtErrors !== true;
|
||
|
|
var CMapReaderFactory = params.CMapReaderFactory || DOMCMapReaderFactory;
|
||
|
|
|
||
|
|
if (params.disableNativeImageDecoder !== undefined) {
|
||
|
|
deprecated('parameter disableNativeImageDecoder, ' +
|
||
|
|
'use nativeImageDecoderSupport instead');
|
||
|
|
}
|
||
|
|
params.nativeImageDecoderSupport = params.nativeImageDecoderSupport ||
|
||
|
|
(params.disableNativeImageDecoder === true ? NativeImageDecoding.NONE :
|
||
|
|
NativeImageDecoding.DECODE);
|
||
|
|
if (params.nativeImageDecoderSupport !== NativeImageDecoding.DECODE &&
|
||
|
|
params.nativeImageDecoderSupport !== NativeImageDecoding.NONE &&
|
||
|
|
params.nativeImageDecoderSupport !== NativeImageDecoding.DISPLAY) {
|
||
|
|
warn('Invalid parameter nativeImageDecoderSupport: ' +
|
||
|
|
'need a state of enum {NativeImageDecoding}');
|
||
|
|
params.nativeImageDecoderSupport = NativeImageDecoding.DECODE;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!worker) {
|
||
|
|
// Worker was not provided -- creating and owning our own. If message port
|
||
|
|
// is specified in global settings, using it.
|
||
|
|
var workerPort = getDefaultSetting('workerPort');
|
||
|
|
worker = workerPort ? PDFWorker.fromPort(workerPort) : new PDFWorker();
|
||
|
|
task._worker = worker;
|
||
|
|
}
|
||
|
|
var docId = task.docId;
|
||
|
|
worker.promise.then(function () {
|
||
|
|
if (task.destroyed) {
|
||
|
|
throw new Error('Loading aborted');
|
||
|
|
}
|
||
|
|
return _fetchDocument(worker, params, rangeTransport, docId).then(
|
||
|
|
function (workerId) {
|
||
|
|
if (task.destroyed) {
|
||
|
|
throw new Error('Loading aborted');
|
||
|
|
}
|
||
|
|
var messageHandler = new MessageHandler(docId, workerId, worker.port);
|
||
|
|
var transport = new WorkerTransport(messageHandler, task, rangeTransport,
|
||
|
|
CMapReaderFactory);
|
||
|
|
task._transport = transport;
|
||
|
|
messageHandler.send('Ready', null);
|
||
|
|
});
|
||
|
|
}).catch(task._capability.reject);
|
||
|
|
|
||
|
|
return task;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Starts fetching of specified PDF document/data.
|
||
|
|
* @param {PDFWorker} worker
|
||
|
|
* @param {Object} source
|
||
|
|
* @param {PDFDataRangeTransport} pdfDataRangeTransport
|
||
|
|
* @param {string} docId Unique document id, used as MessageHandler id.
|
||
|
|
* @returns {Promise} The promise, which is resolved when worker id of
|
||
|
|
* MessageHandler is known.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function _fetchDocument(worker, source, pdfDataRangeTransport, docId) {
|
||
|
|
if (worker.destroyed) {
|
||
|
|
return Promise.reject(new Error('Worker was destroyed'));
|
||
|
|
}
|
||
|
|
|
||
|
|
source.disableAutoFetch = getDefaultSetting('disableAutoFetch');
|
||
|
|
source.disableStream = getDefaultSetting('disableStream');
|
||
|
|
source.chunkedViewerLoading = !!pdfDataRangeTransport;
|
||
|
|
if (pdfDataRangeTransport) {
|
||
|
|
source.length = pdfDataRangeTransport.length;
|
||
|
|
source.initialData = pdfDataRangeTransport.initialData;
|
||
|
|
}
|
||
|
|
return worker.messageHandler.sendWithPromise('GetDocRequest', {
|
||
|
|
docId,
|
||
|
|
source,
|
||
|
|
disableRange: getDefaultSetting('disableRange'),
|
||
|
|
maxImageSize: getDefaultSetting('maxImageSize'),
|
||
|
|
disableFontFace: getDefaultSetting('disableFontFace'),
|
||
|
|
disableCreateObjectURL: getDefaultSetting('disableCreateObjectURL'),
|
||
|
|
postMessageTransfers: getDefaultSetting('postMessageTransfers') &&
|
||
|
|
!isPostMessageTransfersDisabled,
|
||
|
|
docBaseUrl: source.docBaseUrl,
|
||
|
|
nativeImageDecoderSupport: source.nativeImageDecoderSupport,
|
||
|
|
ignoreErrors: source.ignoreErrors,
|
||
|
|
}).then(function (workerId) {
|
||
|
|
if (worker.destroyed) {
|
||
|
|
throw new Error('Worker was destroyed');
|
||
|
|
}
|
||
|
|
return workerId;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* PDF document loading operation.
|
||
|
|
* @class
|
||
|
|
* @alias PDFDocumentLoadingTask
|
||
|
|
*/
|
||
|
|
var PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() {
|
||
|
|
var nextDocumentId = 0;
|
||
|
|
|
||
|
|
/** @constructs PDFDocumentLoadingTask */
|
||
|
|
function PDFDocumentLoadingTask() {
|
||
|
|
this._capability = createPromiseCapability();
|
||
|
|
this._transport = null;
|
||
|
|
this._worker = null;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Unique document loading task id -- used in MessageHandlers.
|
||
|
|
* @type {string}
|
||
|
|
*/
|
||
|
|
this.docId = 'd' + (nextDocumentId++);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Shows if loading task is destroyed.
|
||
|
|
* @type {boolean}
|
||
|
|
*/
|
||
|
|
this.destroyed = false;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Callback to request a password if wrong or no password was provided.
|
||
|
|
* The callback receives two parameters: function that needs to be called
|
||
|
|
* with new password and reason (see {PasswordResponses}).
|
||
|
|
*/
|
||
|
|
this.onPassword = null;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Callback to be able to monitor the loading progress of the PDF file
|
||
|
|
* (necessary to implement e.g. a loading bar). The callback receives
|
||
|
|
* an {Object} with the properties: {number} loaded and {number} total.
|
||
|
|
*/
|
||
|
|
this.onProgress = null;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Callback to when unsupported feature is used. The callback receives
|
||
|
|
* an {UNSUPPORTED_FEATURES} argument.
|
||
|
|
*/
|
||
|
|
this.onUnsupportedFeature = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
PDFDocumentLoadingTask.prototype =
|
||
|
|
/** @lends PDFDocumentLoadingTask.prototype */ {
|
||
|
|
/**
|
||
|
|
* @return {Promise}
|
||
|
|
*/
|
||
|
|
get promise() {
|
||
|
|
return this._capability.promise;
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Aborts all network requests and destroys worker.
|
||
|
|
* @return {Promise} A promise that is resolved after destruction activity
|
||
|
|
* is completed.
|
||
|
|
*/
|
||
|
|
destroy() {
|
||
|
|
this.destroyed = true;
|
||
|
|
|
||
|
|
var transportDestroyed = !this._transport ? Promise.resolve() :
|
||
|
|
this._transport.destroy();
|
||
|
|
return transportDestroyed.then(() => {
|
||
|
|
this._transport = null;
|
||
|
|
if (this._worker) {
|
||
|
|
this._worker.destroy();
|
||
|
|
this._worker = null;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Registers callbacks to indicate the document loading completion.
|
||
|
|
*
|
||
|
|
* @param {function} onFulfilled The callback for the loading completion.
|
||
|
|
* @param {function} onRejected The callback for the loading failure.
|
||
|
|
* @return {Promise} A promise that is resolved after the onFulfilled or
|
||
|
|
* onRejected callback.
|
||
|
|
*/
|
||
|
|
then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) {
|
||
|
|
return this.promise.then.apply(this.promise, arguments);
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
return PDFDocumentLoadingTask;
|
||
|
|
})();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Abstract class to support range requests file loading.
|
||
|
|
* @class
|
||
|
|
* @alias PDFDataRangeTransport
|
||
|
|
* @param {number} length
|
||
|
|
* @param {Uint8Array} initialData
|
||
|
|
*/
|
||
|
|
var PDFDataRangeTransport = (function pdfDataRangeTransportClosure() {
|
||
|
|
function PDFDataRangeTransport(length, initialData) {
|
||
|
|
this.length = length;
|
||
|
|
this.initialData = initialData;
|
||
|
|
|
||
|
|
this._rangeListeners = [];
|
||
|
|
this._progressListeners = [];
|
||
|
|
this._progressiveReadListeners = [];
|
||
|
|
this._readyCapability = createPromiseCapability();
|
||
|
|
}
|
||
|
|
PDFDataRangeTransport.prototype =
|
||
|
|
/** @lends PDFDataRangeTransport.prototype */ {
|
||
|
|
addRangeListener:
|
||
|
|
function PDFDataRangeTransport_addRangeListener(listener) {
|
||
|
|
this._rangeListeners.push(listener);
|
||
|
|
},
|
||
|
|
|
||
|
|
addProgressListener:
|
||
|
|
function PDFDataRangeTransport_addProgressListener(listener) {
|
||
|
|
this._progressListeners.push(listener);
|
||
|
|
},
|
||
|
|
|
||
|
|
addProgressiveReadListener:
|
||
|
|
function PDFDataRangeTransport_addProgressiveReadListener(listener) {
|
||
|
|
this._progressiveReadListeners.push(listener);
|
||
|
|
},
|
||
|
|
|
||
|
|
onDataRange: function PDFDataRangeTransport_onDataRange(begin, chunk) {
|
||
|
|
var listeners = this._rangeListeners;
|
||
|
|
for (var i = 0, n = listeners.length; i < n; ++i) {
|
||
|
|
listeners[i](begin, chunk);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) {
|
||
|
|
this._readyCapability.promise.then(() => {
|
||
|
|
var listeners = this._progressListeners;
|
||
|
|
for (var i = 0, n = listeners.length; i < n; ++i) {
|
||
|
|
listeners[i](loaded);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
},
|
||
|
|
|
||
|
|
onDataProgressiveRead:
|
||
|
|
function PDFDataRangeTransport_onDataProgress(chunk) {
|
||
|
|
this._readyCapability.promise.then(() => {
|
||
|
|
var listeners = this._progressiveReadListeners;
|
||
|
|
for (var i = 0, n = listeners.length; i < n; ++i) {
|
||
|
|
listeners[i](chunk);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
},
|
||
|
|
|
||
|
|
transportReady: function PDFDataRangeTransport_transportReady() {
|
||
|
|
this._readyCapability.resolve();
|
||
|
|
},
|
||
|
|
|
||
|
|
requestDataRange:
|
||
|
|
function PDFDataRangeTransport_requestDataRange(begin, end) {
|
||
|
|
throw new Error('Abstract method PDFDataRangeTransport.requestDataRange');
|
||
|
|
},
|
||
|
|
|
||
|
|
abort: function PDFDataRangeTransport_abort() {
|
||
|
|
},
|
||
|
|
};
|
||
|
|
return PDFDataRangeTransport;
|
||
|
|
})();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Proxy to a PDFDocument in the worker thread. Also, contains commonly used
|
||
|
|
* properties that can be read synchronously.
|
||
|
|
* @class
|
||
|
|
* @alias PDFDocumentProxy
|
||
|
|
*/
|
||
|
|
var PDFDocumentProxy = (function PDFDocumentProxyClosure() {
|
||
|
|
function PDFDocumentProxy(pdfInfo, transport, loadingTask) {
|
||
|
|
this.pdfInfo = pdfInfo;
|
||
|
|
this.transport = transport;
|
||
|
|
this.loadingTask = loadingTask;
|
||
|
|
}
|
||
|
|
PDFDocumentProxy.prototype = /** @lends PDFDocumentProxy.prototype */ {
|
||
|
|
/**
|
||
|
|
* @return {number} Total number of pages the PDF contains.
|
||
|
|
*/
|
||
|
|
get numPages() {
|
||
|
|
return this.pdfInfo.numPages;
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {string} A unique ID to identify a PDF. Not guaranteed to be
|
||
|
|
* unique.
|
||
|
|
*/
|
||
|
|
get fingerprint() {
|
||
|
|
return this.pdfInfo.fingerprint;
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @param {number} pageNumber The page number to get. The first page is 1.
|
||
|
|
* @return {Promise} A promise that is resolved with a {@link PDFPageProxy}
|
||
|
|
* object.
|
||
|
|
*/
|
||
|
|
getPage: function PDFDocumentProxy_getPage(pageNumber) {
|
||
|
|
return this.transport.getPage(pageNumber);
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @param {{num: number, gen: number}} ref The page reference. Must have
|
||
|
|
* the 'num' and 'gen' properties.
|
||
|
|
* @return {Promise} A promise that is resolved with the page index that is
|
||
|
|
* associated with the reference.
|
||
|
|
*/
|
||
|
|
getPageIndex: function PDFDocumentProxy_getPageIndex(ref) {
|
||
|
|
return this.transport.getPageIndex(ref);
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {Promise} A promise that is resolved with a lookup table for
|
||
|
|
* mapping named destinations to reference numbers.
|
||
|
|
*
|
||
|
|
* This can be slow for large documents: use getDestination instead
|
||
|
|
*/
|
||
|
|
getDestinations: function PDFDocumentProxy_getDestinations() {
|
||
|
|
return this.transport.getDestinations();
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @param {string} id The named destination to get.
|
||
|
|
* @return {Promise} A promise that is resolved with all information
|
||
|
|
* of the given named destination.
|
||
|
|
*/
|
||
|
|
getDestination: function PDFDocumentProxy_getDestination(id) {
|
||
|
|
return this.transport.getDestination(id);
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {Promise} A promise that is resolved with:
|
||
|
|
* an Array containing the pageLabels that correspond to the pageIndexes,
|
||
|
|
* or `null` when no pageLabels are present in the PDF file.
|
||
|
|
*/
|
||
|
|
getPageLabels: function PDFDocumentProxy_getPageLabels() {
|
||
|
|
return this.transport.getPageLabels();
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {Promise} A promise that is resolved with a lookup table for
|
||
|
|
* mapping named attachments to their content.
|
||
|
|
*/
|
||
|
|
getAttachments: function PDFDocumentProxy_getAttachments() {
|
||
|
|
return this.transport.getAttachments();
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {Promise} A promise that is resolved with an array of all the
|
||
|
|
* JavaScript strings in the name tree.
|
||
|
|
*/
|
||
|
|
getJavaScript: function PDFDocumentProxy_getJavaScript() {
|
||
|
|
return this.transport.getJavaScript();
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {Promise} A promise that is resolved with an {Array} that is a
|
||
|
|
* tree outline (if it has one) of the PDF. The tree is in the format of:
|
||
|
|
* [
|
||
|
|
* {
|
||
|
|
* title: string,
|
||
|
|
* bold: boolean,
|
||
|
|
* italic: boolean,
|
||
|
|
* color: rgb Uint8Array,
|
||
|
|
* dest: dest obj,
|
||
|
|
* url: string,
|
||
|
|
* items: array of more items like this
|
||
|
|
* },
|
||
|
|
* ...
|
||
|
|
* ].
|
||
|
|
*/
|
||
|
|
getOutline: function PDFDocumentProxy_getOutline() {
|
||
|
|
return this.transport.getOutline();
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {Promise} A promise that is resolved with an {Object} that has
|
||
|
|
* info and metadata properties. Info is an {Object} filled with anything
|
||
|
|
* available in the information dictionary and similarly metadata is a
|
||
|
|
* {Metadata} object with information from the metadata section of the PDF.
|
||
|
|
*/
|
||
|
|
getMetadata: function PDFDocumentProxy_getMetadata() {
|
||
|
|
return this.transport.getMetadata();
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {Promise} A promise that is resolved with a TypedArray that has
|
||
|
|
* the raw data from the PDF.
|
||
|
|
*/
|
||
|
|
getData: function PDFDocumentProxy_getData() {
|
||
|
|
return this.transport.getData();
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {Promise} A promise that is resolved when the document's data
|
||
|
|
* is loaded. It is resolved with an {Object} that contains the length
|
||
|
|
* property that indicates size of the PDF data in bytes.
|
||
|
|
*/
|
||
|
|
getDownloadInfo: function PDFDocumentProxy_getDownloadInfo() {
|
||
|
|
return this.transport.downloadInfoCapability.promise;
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {Promise} A promise this is resolved with current stats about
|
||
|
|
* document structures (see {@link PDFDocumentStats}).
|
||
|
|
*/
|
||
|
|
getStats: function PDFDocumentProxy_getStats() {
|
||
|
|
return this.transport.getStats();
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* Cleans up resources allocated by the document, e.g. created @font-face.
|
||
|
|
*/
|
||
|
|
cleanup: function PDFDocumentProxy_cleanup() {
|
||
|
|
this.transport.startCleanup();
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* Destroys current document instance and terminates worker.
|
||
|
|
*/
|
||
|
|
destroy: function PDFDocumentProxy_destroy() {
|
||
|
|
return this.loadingTask.destroy();
|
||
|
|
},
|
||
|
|
};
|
||
|
|
return PDFDocumentProxy;
|
||
|
|
})();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Page getTextContent parameters.
|
||
|
|
*
|
||
|
|
* @typedef {Object} getTextContentParameters
|
||
|
|
* @property {boolean} normalizeWhitespace - replaces all occurrences of
|
||
|
|
* whitespace with standard spaces (0x20). The default value is `false`.
|
||
|
|
* @property {boolean} disableCombineTextItems - do not attempt to combine
|
||
|
|
* same line {@link TextItem}'s. The default value is `false`.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Page text content.
|
||
|
|
*
|
||
|
|
* @typedef {Object} TextContent
|
||
|
|
* @property {array} items - array of {@link TextItem}
|
||
|
|
* @property {Object} styles - {@link TextStyles} objects, indexed by font name.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Page text content part.
|
||
|
|
*
|
||
|
|
* @typedef {Object} TextItem
|
||
|
|
* @property {string} str - text content.
|
||
|
|
* @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'.
|
||
|
|
* @property {array} transform - transformation matrix.
|
||
|
|
* @property {number} width - width in device space.
|
||
|
|
* @property {number} height - height in device space.
|
||
|
|
* @property {string} fontName - font name used by pdf.js for converted font.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Text style.
|
||
|
|
*
|
||
|
|
* @typedef {Object} TextStyle
|
||
|
|
* @property {number} ascent - font ascent.
|
||
|
|
* @property {number} descent - font descent.
|
||
|
|
* @property {boolean} vertical - text is in vertical mode.
|
||
|
|
* @property {string} fontFamily - possible font family
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Page annotation parameters.
|
||
|
|
*
|
||
|
|
* @typedef {Object} GetAnnotationsParameters
|
||
|
|
* @property {string} intent - Determines the annotations that will be fetched,
|
||
|
|
* can be either 'display' (viewable annotations) or 'print'
|
||
|
|
* (printable annotations).
|
||
|
|
* If the parameter is omitted, all annotations are fetched.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Page render parameters.
|
||
|
|
*
|
||
|
|
* @typedef {Object} RenderParameters
|
||
|
|
* @property {Object} canvasContext - A 2D context of a DOM Canvas object.
|
||
|
|
* @property {PageViewport} viewport - Rendering viewport obtained by
|
||
|
|
* calling of PDFPage.getViewport method.
|
||
|
|
* @property {string} intent - Rendering intent, can be 'display' or 'print'
|
||
|
|
* (default value is 'display').
|
||
|
|
* @property {boolean} renderInteractiveForms - (optional) Whether or not
|
||
|
|
* interactive form elements are rendered in the display
|
||
|
|
* layer. If so, we do not render them on canvas as well.
|
||
|
|
* @property {Array} transform - (optional) Additional transform, applied
|
||
|
|
* just before viewport transform.
|
||
|
|
* @property {Object} imageLayer - (optional) An object that has beginLayout,
|
||
|
|
* endLayout and appendImage functions.
|
||
|
|
* @property {function} continueCallback - (deprecated) A function that will be
|
||
|
|
* called each time the rendering is paused. To continue
|
||
|
|
* rendering call the function that is the first argument
|
||
|
|
* to the callback.
|
||
|
|
* @property {Object} canvasFactory - (optional) The factory that will be used
|
||
|
|
* when creating canvases. The default value is
|
||
|
|
* {DOMCanvasFactory}.
|
||
|
|
* @property {Object} background - (optional) Background to use for the canvas.
|
||
|
|
* Can use any valid canvas.fillStyle: A DOMString parsed as
|
||
|
|
* CSS <color> value, a CanvasGradient object (a linear or
|
||
|
|
* radial gradient) or a CanvasPattern object (a repetitive
|
||
|
|
* image). The default value is 'rgb(255,255,255)'.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* PDF page operator list.
|
||
|
|
*
|
||
|
|
* @typedef {Object} PDFOperatorList
|
||
|
|
* @property {Array} fnArray - Array containing the operator functions.
|
||
|
|
* @property {Array} argsArray - Array containing the arguments of the
|
||
|
|
* functions.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Proxy to a PDFPage in the worker thread.
|
||
|
|
* @class
|
||
|
|
* @alias PDFPageProxy
|
||
|
|
*/
|
||
|
|
var PDFPageProxy = (function PDFPageProxyClosure() {
|
||
|
|
function PDFPageProxy(pageIndex, pageInfo, transport) {
|
||
|
|
this.pageIndex = pageIndex;
|
||
|
|
this.pageInfo = pageInfo;
|
||
|
|
this.transport = transport;
|
||
|
|
this.stats = new StatTimer();
|
||
|
|
this.stats.enabled = getDefaultSetting('enableStats');
|
||
|
|
this.commonObjs = transport.commonObjs;
|
||
|
|
this.objs = new PDFObjects();
|
||
|
|
this.cleanupAfterRender = false;
|
||
|
|
this.pendingCleanup = false;
|
||
|
|
this.intentStates = Object.create(null);
|
||
|
|
this.destroyed = false;
|
||
|
|
}
|
||
|
|
PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ {
|
||
|
|
/**
|
||
|
|
* @return {number} Page number of the page. First page is 1.
|
||
|
|
*/
|
||
|
|
get pageNumber() {
|
||
|
|
return this.pageIndex + 1;
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {number} The number of degrees the page is rotated clockwise.
|
||
|
|
*/
|
||
|
|
get rotate() {
|
||
|
|
return this.pageInfo.rotate;
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {Object} The reference that points to this page. It has 'num' and
|
||
|
|
* 'gen' properties.
|
||
|
|
*/
|
||
|
|
get ref() {
|
||
|
|
return this.pageInfo.ref;
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {number} The default size of units in 1/72nds of an inch.
|
||
|
|
*/
|
||
|
|
get userUnit() {
|
||
|
|
return this.pageInfo.userUnit;
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @return {Array} An array of the visible portion of the PDF page in the
|
||
|
|
* user space units - [x1, y1, x2, y2].
|
||
|
|
*/
|
||
|
|
get view() {
|
||
|
|
return this.pageInfo.view;
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @param {number} scale The desired scale of the viewport.
|
||
|
|
* @param {number} rotate Degrees to rotate the viewport. If omitted this
|
||
|
|
* defaults to the page rotation.
|
||
|
|
* @return {PageViewport} Contains 'width' and 'height' properties
|
||
|
|
* along with transforms required for rendering.
|
||
|
|
*/
|
||
|
|
getViewport: function PDFPageProxy_getViewport(scale, rotate) {
|
||
|
|
if (arguments.length < 2) {
|
||
|
|
rotate = this.rotate;
|
||
|
|
}
|
||
|
|
return new PageViewport(this.view, scale, rotate, 0, 0);
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* @param {GetAnnotationsParameters} params - Annotation parameters.
|
||
|
|
* @return {Promise} A promise that is resolved with an {Array} of the
|
||
|
|
* annotation objects.
|
||
|
|
*/
|
||
|
|
getAnnotations: function PDFPageProxy_getAnnotations(params) {
|
||
|
|
var intent = (params && params.intent) || null;
|
||
|
|
|
||
|
|
if (!this.annotationsPromise || this.annotationsIntent !== intent) {
|
||
|
|
this.annotationsPromise = this.transport.getAnnotations(this.pageIndex,
|
||
|
|
intent);
|
||
|
|
this.annotationsIntent = intent;
|
||
|
|
}
|
||
|
|
return this.annotationsPromise;
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* Begins the process of rendering a page to the desired context.
|
||
|
|
* @param {RenderParameters} params Page render parameters.
|
||
|
|
* @return {RenderTask} An object that contains the promise, which
|
||
|
|
* is resolved when the page finishes rendering.
|
||
|
|
*/
|
||
|
|
render: function PDFPageProxy_render(params) {
|
||
|
|
var stats = this.stats;
|
||
|
|
stats.time('Overall');
|
||
|
|
|
||
|
|
// If there was a pending destroy cancel it so no cleanup happens during
|
||
|
|
// this call to render.
|
||
|
|
this.pendingCleanup = false;
|
||
|
|
|
||
|
|
var renderingIntent = (params.intent === 'print' ? 'print' : 'display');
|
||
|
|
var canvasFactory = params.canvasFactory || new DOMCanvasFactory();
|
||
|
|
|
||
|
|
if (!this.intentStates[renderingIntent]) {
|
||
|
|
this.intentStates[renderingIntent] = Object.create(null);
|
||
|
|
}
|
||
|
|
var intentState = this.intentStates[renderingIntent];
|
||
|
|
|
||
|
|
// If there's no displayReadyCapability yet, then the operatorList
|
||
|
|
// was never requested before. Make the request and create the promise.
|
||
|
|
if (!intentState.displayReadyCapability) {
|
||
|
|
intentState.receivingOperatorList = true;
|
||
|
|
intentState.displayReadyCapability = createPromiseCapability();
|
||
|
|
intentState.operatorList = {
|
||
|
|
fnArray: [],
|
||
|
|
argsArray: [],
|
||
|
|
lastChunk: false,
|
||
|
|
};
|
||
|
|
|
||
|
|
this.stats.time('Page Request');
|
||
|
|
this.transport.messageHandler.send('RenderPageRequest', {
|
||
|
|
pageIndex: this.pageNumber - 1,
|
||
|
|
intent: renderingIntent,
|
||
|
|
renderInteractiveForms: (params.renderInteractiveForms === true),
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
var complete = (error) => {
|
||
|
|
var i = intentState.renderTasks.indexOf(internalRenderTask);
|
||
|
|
if (i >= 0) {
|
||
|
|
intentState.renderTasks.splice(i, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (this.cleanupAfterRender) {
|
||
|
|
this.pendingCleanup = true;
|
||
|
|
}
|
||
|
|
this._tryCleanup();
|
||
|
|
|
||
|
|
if (error) {
|
||
|
|
internalRenderTask.capability.reject(error);
|
||
|
|
} else {
|
||
|
|
internalRenderTask.capability.resolve();
|
||
|
|
}
|
||
|
|
stats.timeEnd('Rendering');
|
||
|
|
stats.timeEnd('Overall');
|
||
|
|
};
|
||
|
|
|
||
|
|
var internalRenderTask = new InternalRenderTask(complete, params,
|
||
|
|
this.objs,
|
||
|
|
this.commonObjs,
|
||
|
|
intentState.operatorList,
|
||
|
|
this.pageNumber,
|
||
|
|
canvasFactory);
|
||
|
|
internalRenderTask.useRequestAnimationFrame = renderingIntent !== 'print';
|
||
|
|
if (!intentState.renderTasks) {
|
||
|
|
intentState.renderTasks = [];
|
||
|
|
}
|
||
|
|
intentState.renderTasks.push(internalRenderTask);
|
||
|
|
var renderTask = internalRenderTask.task;
|
||
|
|
|
||
|
|
// Obsolete parameter support
|
||
|
|
if (params.continueCallback) {
|
||
|
|
deprecated('render is used with continueCallback parameter');
|
||
|
|
renderTask.onContinue = params.continueCallback;
|
||
|
|
}
|
||
|
|
|
||
|
|
intentState.displayReadyCapability.promise.then((transparency) => {
|
||
|
|
if (this.pendingCleanup) {
|
||
|
|
complete();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
stats.time('Rendering');
|
||
|
|
internalRenderTask.initializeGraphics(transparency);
|
||
|
|
internalRenderTask.operatorListChanged();
|
||
|
|
}, complete);
|
||
|
|
|
||
|
|
return renderTask;
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @return {Promise} A promise resolved with an {@link PDFOperatorList}
|
||
|
|
* object that represents page's operator list.
|
||
|
|
*/
|
||
|
|
getOperatorList: function PDFPageProxy_getOperatorList() {
|
||
|
|
function operatorListChanged() {
|
||
|
|
if (intentState.operatorList.lastChunk) {
|
||
|
|
intentState.opListReadCapability.resolve(intentState.operatorList);
|
||
|
|
|
||
|
|
var i = intentState.renderTasks.indexOf(opListTask);
|
||
|
|
if (i >= 0) {
|
||
|
|
intentState.renderTasks.splice(i, 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var renderingIntent = 'oplist';
|
||
|
|
if (!this.intentStates[renderingIntent]) {
|
||
|
|
this.intentStates[renderingIntent] = Object.create(null);
|
||
|
|
}
|
||
|
|
var intentState = this.intentStates[renderingIntent];
|
||
|
|
var opListTask;
|
||
|
|
|
||
|
|
if (!intentState.opListReadCapability) {
|
||
|
|
opListTask = {};
|
||
|
|
opListTask.operatorListChanged = operatorListChanged;
|
||
|
|
intentState.receivingOperatorList = true;
|
||
|
|
intentState.opListReadCapability = createPromiseCapability();
|
||
|
|
intentState.renderTasks = [];
|
||
|
|
intentState.renderTasks.push(opListTask);
|
||
|
|
intentState.operatorList = {
|
||
|
|
fnArray: [],
|
||
|
|
argsArray: [],
|
||
|
|
lastChunk: false,
|
||
|
|
};
|
||
|
|
|
||
|
|
this.transport.messageHandler.send('RenderPageRequest', {
|
||
|
|
pageIndex: this.pageIndex,
|
||
|
|
intent: renderingIntent,
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return intentState.opListReadCapability.promise;
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param {getTextContentParameters} params - getTextContent parameters.
|
||
|
|
* @return {Promise} That is resolved a {@link TextContent}
|
||
|
|
* object that represent the page text content.
|
||
|
|
*/
|
||
|
|
getTextContent: function PDFPageProxy_getTextContent(params) {
|
||
|
|
params = params || {};
|
||
|
|
return this.transport.messageHandler.sendWithPromise('GetTextContent', {
|
||
|
|
pageIndex: this.pageNumber - 1,
|
||
|
|
normalizeWhitespace: (params.normalizeWhitespace === true),
|
||
|
|
combineTextItems: (params.disableCombineTextItems !== true),
|
||
|
|
});
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Destroys page object.
|
||
|
|
*/
|
||
|
|
_destroy: function PDFPageProxy_destroy() {
|
||
|
|
this.destroyed = true;
|
||
|
|
this.transport.pageCache[this.pageIndex] = null;
|
||
|
|
|
||
|
|
var waitOn = [];
|
||
|
|
Object.keys(this.intentStates).forEach(function(intent) {
|
||
|
|
if (intent === 'oplist') {
|
||
|
|
// Avoid errors below, since the renderTasks are just stubs.
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var intentState = this.intentStates[intent];
|
||
|
|
intentState.renderTasks.forEach(function(renderTask) {
|
||
|
|
var renderCompleted = renderTask.capability.promise.
|
||
|
|
catch(function () {}); // ignoring failures
|
||
|
|
waitOn.push(renderCompleted);
|
||
|
|
renderTask.cancel();
|
||
|
|
});
|
||
|
|
}, this);
|
||
|
|
this.objs.clear();
|
||
|
|
this.annotationsPromise = null;
|
||
|
|
this.pendingCleanup = false;
|
||
|
|
return Promise.all(waitOn);
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Cleans up resources allocated by the page. (deprecated)
|
||
|
|
*/
|
||
|
|
destroy() {
|
||
|
|
deprecated('page destroy method, use cleanup() instead');
|
||
|
|
this.cleanup();
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Cleans up resources allocated by the page.
|
||
|
|
*/
|
||
|
|
cleanup: function PDFPageProxy_cleanup() {
|
||
|
|
this.pendingCleanup = true;
|
||
|
|
this._tryCleanup();
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* For internal use only. Attempts to clean up if rendering is in a state
|
||
|
|
* where that's possible.
|
||
|
|
* @ignore
|
||
|
|
*/
|
||
|
|
_tryCleanup: function PDFPageProxy_tryCleanup() {
|
||
|
|
if (!this.pendingCleanup ||
|
||
|
|
Object.keys(this.intentStates).some(function(intent) {
|
||
|
|
var intentState = this.intentStates[intent];
|
||
|
|
return (intentState.renderTasks.length !== 0 ||
|
||
|
|
intentState.receivingOperatorList);
|
||
|
|
}, this)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
Object.keys(this.intentStates).forEach(function(intent) {
|
||
|
|
delete this.intentStates[intent];
|
||
|
|
}, this);
|
||
|
|
this.objs.clear();
|
||
|
|
this.annotationsPromise = null;
|
||
|
|
this.pendingCleanup = false;
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* For internal use only.
|
||
|
|
* @ignore
|
||
|
|
*/
|
||
|
|
_startRenderPage: function PDFPageProxy_startRenderPage(transparency,
|
||
|
|
intent) {
|
||
|
|
var intentState = this.intentStates[intent];
|
||
|
|
// TODO Refactor RenderPageRequest to separate rendering
|
||
|
|
// and operator list logic
|
||
|
|
if (intentState.displayReadyCapability) {
|
||
|
|
intentState.displayReadyCapability.resolve(transparency);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* For internal use only.
|
||
|
|
* @ignore
|
||
|
|
*/
|
||
|
|
_renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk,
|
||
|
|
intent) {
|
||
|
|
var intentState = this.intentStates[intent];
|
||
|
|
var i, ii;
|
||
|
|
// Add the new chunk to the current operator list.
|
||
|
|
for (i = 0, ii = operatorListChunk.length; i < ii; i++) {
|
||
|
|
intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]);
|
||
|
|
intentState.operatorList.argsArray.push(
|
||
|
|
operatorListChunk.argsArray[i]);
|
||
|
|
}
|
||
|
|
intentState.operatorList.lastChunk = operatorListChunk.lastChunk;
|
||
|
|
|
||
|
|
// Notify all the rendering tasks there are more operators to be consumed.
|
||
|
|
for (i = 0; i < intentState.renderTasks.length; i++) {
|
||
|
|
intentState.renderTasks[i].operatorListChanged();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (operatorListChunk.lastChunk) {
|
||
|
|
intentState.receivingOperatorList = false;
|
||
|
|
this._tryCleanup();
|
||
|
|
}
|
||
|
|
},
|
||
|
|
};
|
||
|
|
return PDFPageProxy;
|
||
|
|
})();
|
||
|
|
|
||
|
|
class LoopbackPort {
|
||
|
|
constructor(defer) {
|
||
|
|
this._listeners = [];
|
||
|
|
this._defer = defer;
|
||
|
|
this._deferred = Promise.resolve(undefined);
|
||
|
|
}
|
||
|
|
|
||
|
|
postMessage(obj, transfers) {
|
||
|
|
function cloneValue(value) {
|
||
|
|
// Trying to perform a structured clone close to the spec, including
|
||
|
|
// transfers.
|
||
|
|
if (typeof value !== 'object' || value === null) {
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
if (cloned.has(value)) { // already cloned the object
|
||
|
|
return cloned.get(value);
|
||
|
|
}
|
||
|
|
var result;
|
||
|
|
var buffer;
|
||
|
|
if ((buffer = value.buffer) && isArrayBuffer(buffer)) {
|
||
|
|
// We found object with ArrayBuffer (typed array).
|
||
|
|
var transferable = transfers && transfers.indexOf(buffer) >= 0;
|
||
|
|
if (value === buffer) {
|
||
|
|
// Special case when we are faking typed arrays in compatibility.js.
|
||
|
|
result = value;
|
||
|
|
} else if (transferable) {
|
||
|
|
result = new value.constructor(buffer, value.byteOffset,
|
||
|
|
value.byteLength);
|
||
|
|
} else {
|
||
|
|
result = new value.constructor(value);
|
||
|
|
}
|
||
|
|
cloned.set(value, result);
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
result = isArray(value) ? [] : {};
|
||
|
|
cloned.set(value, result); // adding to cache now for cyclic references
|
||
|
|
// Cloning all value and object properties, however ignoring properties
|
||
|
|
// defined via getter.
|
||
|
|
for (var i in value) {
|
||
|
|
var desc, p = value;
|
||
|
|
while (!(desc = Object.getOwnPropertyDescriptor(p, i))) {
|
||
|
|
p = Object.getPrototypeOf(p);
|
||
|
|
}
|
||
|
|
if (typeof desc.value === 'undefined' ||
|
||
|
|
typeof desc.value === 'function') {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
result[i] = cloneValue(desc.value);
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!this._defer) {
|
||
|
|
this._listeners.forEach(function (listener) {
|
||
|
|
listener.call(this, { data: obj, });
|
||
|
|
}, this);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
var cloned = new WeakMap();
|
||
|
|
var e = { data: cloneValue(obj), };
|
||
|
|
this._deferred.then(() => {
|
||
|
|
this._listeners.forEach(function (listener) {
|
||
|
|
listener.call(this, e);
|
||
|
|
}, this);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
addEventListener(name, listener) {
|
||
|
|
this._listeners.push(listener);
|
||
|
|
}
|
||
|
|
|
||
|
|
removeEventListener(name, listener) {
|
||
|
|
var i = this._listeners.indexOf(listener);
|
||
|
|
this._listeners.splice(i, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
terminate() {
|
||
|
|
this._listeners = [];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* PDF.js web worker abstraction, it controls instantiation of PDF documents and
|
||
|
|
* WorkerTransport for them. If creation of a web worker is not possible,
|
||
|
|
* a "fake" worker will be used instead.
|
||
|
|
* @class
|
||
|
|
*/
|
||
|
|
var PDFWorker = (function PDFWorkerClosure() {
|
||
|
|
let nextFakeWorkerId = 0;
|
||
|
|
|
||
|
|
function getWorkerSrc() {
|
||
|
|
if (typeof workerSrc !== 'undefined') {
|
||
|
|
return workerSrc;
|
||
|
|
}
|
||
|
|
if (getDefaultSetting('workerSrc')) {
|
||
|
|
return getDefaultSetting('workerSrc');
|
||
|
|
}
|
||
|
|
if (typeof PDFJSDev !== 'undefined' &&
|
||
|
|
PDFJSDev.test('PRODUCTION && !(MOZCENTRAL || FIREFOX)') &&
|
||
|
|
pdfjsFilePath) {
|
||
|
|
return pdfjsFilePath.replace(/(\.(?:min\.)?js)(\?.*)?$/i, '.worker$1$2');
|
||
|
|
}
|
||
|
|
error('No PDFJS.workerSrc specified');
|
||
|
|
}
|
||
|
|
|
||
|
|
let fakeWorkerFilesLoadedCapability;
|
||
|
|
|
||
|
|
// Loads worker code into main thread.
|
||
|
|
function setupFakeWorkerGlobal() {
|
||
|
|
var WorkerMessageHandler;
|
||
|
|
if (fakeWorkerFilesLoadedCapability) {
|
||
|
|
return fakeWorkerFilesLoadedCapability.promise;
|
||
|
|
}
|
||
|
|
fakeWorkerFilesLoadedCapability = createPromiseCapability();
|
||
|
|
// In the developer build load worker_loader which in turn loads all the
|
||
|
|
// other files and resolves the promise. In production only the
|
||
|
|
// pdf.worker.js file is needed.
|
||
|
|
if (typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION')) {
|
||
|
|
if (typeof SystemJS === 'object') {
|
||
|
|
Promise.all([SystemJS.import('pdfjs/core/network'),
|
||
|
|
SystemJS.import('pdfjs/core/worker')]).then((modules) => {
|
||
|
|
var worker = modules[1];
|
||
|
|
WorkerMessageHandler = worker.WorkerMessageHandler;
|
||
|
|
fakeWorkerFilesLoadedCapability.resolve(WorkerMessageHandler);
|
||
|
|
});
|
||
|
|
} else if (typeof require === 'function') {
|
||
|
|
var worker = require('../core/worker.js');
|
||
|
|
WorkerMessageHandler = worker.WorkerMessageHandler;
|
||
|
|
fakeWorkerFilesLoadedCapability.resolve(WorkerMessageHandler);
|
||
|
|
} else {
|
||
|
|
throw new Error(
|
||
|
|
'SystemJS or CommonJS must be used to load fake worker.');
|
||
|
|
}
|
||
|
|
} else if (PDFJSDev.test('SINGLE_FILE')) {
|
||
|
|
var pdfjsCoreWorker = require('../core/worker.js');
|
||
|
|
require('../core/network.js');
|
||
|
|
WorkerMessageHandler = pdfjsCoreWorker.WorkerMessageHandler;
|
||
|
|
fakeWorkerFilesLoadedCapability.resolve(WorkerMessageHandler);
|
||
|
|
} else {
|
||
|
|
var loader = fakeWorkerFilesLoader || function (callback) {
|
||
|
|
Util.loadScript(getWorkerSrc(), function () {
|
||
|
|
callback(window.pdfjsDistBuildPdfWorker.WorkerMessageHandler);
|
||
|
|
});
|
||
|
|
};
|
||
|
|
loader(fakeWorkerFilesLoadedCapability.resolve);
|
||
|
|
}
|
||
|
|
return fakeWorkerFilesLoadedCapability.promise;
|
||
|
|
}
|
||
|
|
|
||
|
|
function createCDNWrapper(url) {
|
||
|
|
// We will rely on blob URL's property to specify origin.
|
||
|
|
// We want this function to fail in case if createObjectURL or Blob do not
|
||
|
|
// exist or fail for some reason -- our Worker creation will fail anyway.
|
||
|
|
var wrapper = 'importScripts(\'' + url + '\');';
|
||
|
|
return URL.createObjectURL(new Blob([wrapper]));
|
||
|
|
}
|
||
|
|
|
||
|
|
let pdfWorkerPorts = new WeakMap();
|
||
|
|
|
||
|
|
function PDFWorker(name, port) {
|
||
|
|
if (pdfWorkerPorts.has(port)) {
|
||
|
|
throw new Error('Cannot use more than one PDFWorker per port');
|
||
|
|
}
|
||
|
|
|
||
|
|
this.name = name;
|
||
|
|
this.destroyed = false;
|
||
|
|
|
||
|
|
this._readyCapability = createPromiseCapability();
|
||
|
|
this._port = null;
|
||
|
|
this._webWorker = null;
|
||
|
|
this._messageHandler = null;
|
||
|
|
|
||
|
|
if (port) {
|
||
|
|
pdfWorkerPorts.set(port, this);
|
||
|
|
this._initializeFromPort(port);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
this._initialize();
|
||
|
|
}
|
||
|
|
|
||
|
|
PDFWorker.prototype = /** @lends PDFWorker.prototype */ {
|
||
|
|
get promise() {
|
||
|
|
return this._readyCapability.promise;
|
||
|
|
},
|
||
|
|
|
||
|
|
get port() {
|
||
|
|
return this._port;
|
||
|
|
},
|
||
|
|
|
||
|
|
get messageHandler() {
|
||
|
|
return this._messageHandler;
|
||
|
|
},
|
||
|
|
|
||
|
|
_initializeFromPort: function PDFWorker_initializeFromPort(port) {
|
||
|
|
this._port = port;
|
||
|
|
this._messageHandler = new MessageHandler('main', 'worker', port);
|
||
|
|
this._messageHandler.on('ready', function () {
|
||
|
|
// Ignoring 'ready' event -- MessageHandler shall be already initialized
|
||
|
|
// and ready to accept the messages.
|
||
|
|
});
|
||
|
|
this._readyCapability.resolve();
|
||
|
|
},
|
||
|
|
|
||
|
|
_initialize: function PDFWorker_initialize() {
|
||
|
|
// If worker support isn't disabled explicit and the browser has worker
|
||
|
|
// support, create a new web worker and test if it/the browser fulfills
|
||
|
|
// all requirements to run parts of pdf.js in a web worker.
|
||
|
|
// Right now, the requirement is, that an Uint8Array is still an
|
||
|
|
// Uint8Array as it arrives on the worker. (Chrome added this with v.15.)
|
||
|
|
if ((typeof PDFJSDev === 'undefined' || !PDFJSDev.test('SINGLE_FILE')) &&
|
||
|
|
!isWorkerDisabled && !getDefaultSetting('disableWorker') &&
|
||
|
|
typeof Worker !== 'undefined') {
|
||
|
|
var workerSrc = getWorkerSrc();
|
||
|
|
|
||
|
|
try {
|
||
|
|
// Wraps workerSrc path into blob URL, if the former does not belong
|
||
|
|
// to the same origin.
|
||
|
|
if (typeof PDFJSDev !== 'undefined' && PDFJSDev.test('GENERIC') &&
|
||
|
|
!isSameOrigin(window.location.href, workerSrc)) {
|
||
|
|
workerSrc = createCDNWrapper(
|
||
|
|
new URL(workerSrc, window.location).href);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Some versions of FF can't create a worker on localhost, see:
|
||
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=683280
|
||
|
|
var worker = new Worker(workerSrc);
|
||
|
|
var messageHandler = new MessageHandler('main', 'worker', worker);
|
||
|
|
var terminateEarly = () => {
|
||
|
|
worker.removeEventListener('error', onWorkerError);
|
||
|
|
messageHandler.destroy();
|
||
|
|
worker.terminate();
|
||
|
|
if (this.destroyed) {
|
||
|
|
this._readyCapability.reject(new Error('Worker was destroyed'));
|
||
|
|
} else {
|
||
|
|
// Fall back to fake worker if the termination is caused by an
|
||
|
|
// error (e.g. NetworkError / SecurityError).
|
||
|
|
this._setupFakeWorker();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
var onWorkerError = () => {
|
||
|
|
if (!this._webWorker) {
|
||
|
|
// Worker failed to initialize due to an error. Clean up and fall
|
||
|
|
// back to the fake worker.
|
||
|
|
terminateEarly();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
worker.addEventListener('error', onWorkerError);
|
||
|
|
|
||
|
|
messageHandler.on('test', (data) => {
|
||
|
|
worker.removeEventListener('error', onWorkerError);
|
||
|
|
if (this.destroyed) {
|
||
|
|
terminateEarly();
|
||
|
|
return; // worker was destroyed
|
||
|
|
}
|
||
|
|
var supportTypedArray = data && data.supportTypedArray;
|
||
|
|
if (supportTypedArray) {
|
||
|
|
this._messageHandler = messageHandler;
|
||
|
|
this._port = worker;
|
||
|
|
this._webWorker = worker;
|
||
|
|
if (!data.supportTransfers) {
|
||
|
|
isPostMessageTransfersDisabled = true;
|
||
|
|
}
|
||
|
|
this._readyCapability.resolve();
|
||
|
|
// Send global setting, e.g. verbosity level.
|
||
|
|
messageHandler.send('configure', {
|
||
|
|
verbosity: getVerbosityLevel(),
|
||
|
|
});
|
||
|
|
} else {
|
||
|
|
this._setupFakeWorker();
|
||
|
|
messageHandler.destroy();
|
||
|
|
worker.terminate();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
messageHandler.on('console_log', function (data) {
|
||
|
|
console.log.apply(console, data);
|
||
|
|
});
|
||
|
|
messageHandler.on('console_error', function (data) {
|
||
|
|
console.error.apply(console, data);
|
||
|
|
});
|
||
|
|
|
||
|
|
messageHandler.on('ready', (data) => {
|
||
|
|
worker.removeEventListener('error', onWorkerError);
|
||
|
|
if (this.destroyed) {
|
||
|
|
terminateEarly();
|
||
|
|
return; // worker was destroyed
|
||
|
|
}
|
||
|
|
try {
|
||
|
|
sendTest();
|
||
|
|
} catch (e) {
|
||
|
|
// We need fallback to a faked worker.
|
||
|
|
this._setupFakeWorker();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
var sendTest = function () {
|
||
|
|
var postMessageTransfers =
|
||
|
|
getDefaultSetting('postMessageTransfers') &&
|
||
|
|
!isPostMessageTransfersDisabled;
|
||
|
|
var testObj = new Uint8Array([postMessageTransfers ? 255 : 0]);
|
||
|
|
// Some versions of Opera throw a DATA_CLONE_ERR on serializing the
|
||
|
|
// typed array. Also, checking if we can use transfers.
|
||
|
|
try {
|
||
|
|
messageHandler.send('test', testObj, [testObj.buffer]);
|
||
|
|
} catch (ex) {
|
||
|
|
info('Cannot use postMessage transfers');
|
||
|
|
testObj[0] = 0;
|
||
|
|
messageHandler.send('test', testObj);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// It might take time for worker to initialize (especially when AMD
|
||
|
|
// loader is used). We will try to send test immediately, and then
|
||
|
|
// when 'ready' message will arrive. The worker shall process only
|
||
|
|
// first received 'test'.
|
||
|
|
sendTest();
|
||
|
|
return;
|
||
|
|
} catch (e) {
|
||
|
|
info('The worker has been disabled.');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Either workers are disabled, not supported or have thrown an exception.
|
||
|
|
// Thus, we fallback to a faked worker.
|
||
|
|
this._setupFakeWorker();
|
||
|
|
},
|
||
|
|
|
||
|
|
_setupFakeWorker: function PDFWorker_setupFakeWorker() {
|
||
|
|
if (!isWorkerDisabled && !getDefaultSetting('disableWorker')) {
|
||
|
|
warn('Setting up fake worker.');
|
||
|
|
isWorkerDisabled = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
setupFakeWorkerGlobal().then((WorkerMessageHandler) => {
|
||
|
|
if (this.destroyed) {
|
||
|
|
this._readyCapability.reject(new Error('Worker was destroyed'));
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// We cannot turn on proper fake port simulation (this includes
|
||
|
|
// structured cloning) when typed arrays are not supported. Relying
|
||
|
|
// on a chance that messages will be sent in proper order.
|
||
|
|
var isTypedArraysPresent = Uint8Array !== Float32Array;
|
||
|
|
var port = new LoopbackPort(isTypedArraysPresent);
|
||
|
|
this._port = port;
|
||
|
|
|
||
|
|
// All fake workers use the same port, making id unique.
|
||
|
|
var id = 'fake' + (nextFakeWorkerId++);
|
||
|
|
|
||
|
|
// If the main thread is our worker, setup the handling for the
|
||
|
|
// messages -- the main thread sends to it self.
|
||
|
|
var workerHandler = new MessageHandler(id + '_worker', id, port);
|
||
|
|
WorkerMessageHandler.setup(workerHandler, port);
|
||
|
|
|
||
|
|
var messageHandler = new MessageHandler(id, id + '_worker', port);
|
||
|
|
this._messageHandler = messageHandler;
|
||
|
|
this._readyCapability.resolve();
|
||
|
|
});
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Destroys the worker instance.
|
||
|
|
*/
|
||
|
|
destroy: function PDFWorker_destroy() {
|
||
|
|
this.destroyed = true;
|
||
|
|
if (this._webWorker) {
|
||
|
|
// We need to terminate only web worker created resource.
|
||
|
|
this._webWorker.terminate();
|
||
|
|
this._webWorker = null;
|
||
|
|
}
|
||
|
|
this._port = null;
|
||
|
|
if (this._messageHandler) {
|
||
|
|
this._messageHandler.destroy();
|
||
|
|
this._messageHandler = null;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
PDFWorker.fromPort = function (port) {
|
||
|
|
if (pdfWorkerPorts.has(port)) {
|
||
|
|
return pdfWorkerPorts.get(port);
|
||
|
|
}
|
||
|
|
return new PDFWorker(null, port);
|
||
|
|
};
|
||
|
|
|
||
|
|
return PDFWorker;
|
||
|
|
})();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* For internal use only.
|
||
|
|
* @ignore
|
||
|
|
*/
|
||
|
|
var WorkerTransport = (function WorkerTransportClosure() {
|
||
|
|
function WorkerTransport(messageHandler, loadingTask, pdfDataRangeTransport,
|
||
|
|
CMapReaderFactory) {
|
||
|
|
this.messageHandler = messageHandler;
|
||
|
|
this.loadingTask = loadingTask;
|
||
|
|
this.pdfDataRangeTransport = pdfDataRangeTransport;
|
||
|
|
this.commonObjs = new PDFObjects();
|
||
|
|
this.fontLoader = new FontLoader(loadingTask.docId);
|
||
|
|
this.CMapReaderFactory = new CMapReaderFactory({
|
||
|
|
baseUrl: getDefaultSetting('cMapUrl'),
|
||
|
|
isCompressed: getDefaultSetting('cMapPacked'),
|
||
|
|
});
|
||
|
|
|
||
|
|
this.destroyed = false;
|
||
|
|
this.destroyCapability = null;
|
||
|
|
this._passwordCapability = null;
|
||
|
|
|
||
|
|
this.pageCache = [];
|
||
|
|
this.pagePromises = [];
|
||
|
|
this.downloadInfoCapability = createPromiseCapability();
|
||
|
|
|
||
|
|
this.setupMessageHandler();
|
||
|
|
}
|
||
|
|
WorkerTransport.prototype = {
|
||
|
|
destroy: function WorkerTransport_destroy() {
|
||
|
|
if (this.destroyCapability) {
|
||
|
|
return this.destroyCapability.promise;
|
||
|
|
}
|
||
|
|
|
||
|
|
this.destroyed = true;
|
||
|
|
this.destroyCapability = createPromiseCapability();
|
||
|
|
|
||
|
|
if (this._passwordCapability) {
|
||
|
|
this._passwordCapability.reject(
|
||
|
|
new Error('Worker was destroyed during onPassword callback'));
|
||
|
|
}
|
||
|
|
|
||
|
|
var waitOn = [];
|
||
|
|
// We need to wait for all renderings to be completed, e.g.
|
||
|
|
// timeout/rAF can take a long time.
|
||
|
|
this.pageCache.forEach(function (page) {
|
||
|
|
if (page) {
|
||
|
|
waitOn.push(page._destroy());
|
||
|
|
}
|
||
|
|
});
|
||
|
|
this.pageCache = [];
|
||
|
|
this.pagePromises = [];
|
||
|
|
// We also need to wait for the worker to finish its long running tasks.
|
||
|
|
var terminated = this.messageHandler.sendWithPromise('Terminate', null);
|
||
|
|
waitOn.push(terminated);
|
||
|
|
Promise.all(waitOn).then(() => {
|
||
|
|
this.fontLoader.clear();
|
||
|
|
if (this.pdfDataRangeTransport) {
|
||
|
|
this.pdfDataRangeTransport.abort();
|
||
|
|
this.pdfDataRangeTransport = null;
|
||
|
|
}
|
||
|
|
if (this.messageHandler) {
|
||
|
|
this.messageHandler.destroy();
|
||
|
|
this.messageHandler = null;
|
||
|
|
}
|
||
|
|
this.destroyCapability.resolve();
|
||
|
|
}, this.destroyCapability.reject);
|
||
|
|
return this.destroyCapability.promise;
|
||
|
|
},
|
||
|
|
|
||
|
|
setupMessageHandler: function WorkerTransport_setupMessageHandler() {
|
||
|
|
var messageHandler = this.messageHandler;
|
||
|
|
var loadingTask = this.loadingTask;
|
||
|
|
|
||
|
|
var pdfDataRangeTransport = this.pdfDataRangeTransport;
|
||
|
|
if (pdfDataRangeTransport) {
|
||
|
|
pdfDataRangeTransport.addRangeListener(function(begin, chunk) {
|
||
|
|
messageHandler.send('OnDataRange', {
|
||
|
|
begin,
|
||
|
|
chunk,
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
pdfDataRangeTransport.addProgressListener(function(loaded) {
|
||
|
|
messageHandler.send('OnDataProgress', {
|
||
|
|
loaded,
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
pdfDataRangeTransport.addProgressiveReadListener(function(chunk) {
|
||
|
|
messageHandler.send('OnDataRange', {
|
||
|
|
chunk,
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
messageHandler.on('RequestDataRange',
|
||
|
|
function transportDataRange(data) {
|
||
|
|
pdfDataRangeTransport.requestDataRange(data.begin, data.end);
|
||
|
|
}, this);
|
||
|
|
}
|
||
|
|
|
||
|
|
messageHandler.on('GetDoc', function transportDoc(data) {
|
||
|
|
var pdfInfo = data.pdfInfo;
|
||
|
|
this.numPages = data.pdfInfo.numPages;
|
||
|
|
var loadingTask = this.loadingTask;
|
||
|
|
var pdfDocument = new PDFDocumentProxy(pdfInfo, this, loadingTask);
|
||
|
|
this.pdfDocument = pdfDocument;
|
||
|
|
loadingTask._capability.resolve(pdfDocument);
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('PasswordRequest',
|
||
|
|
function transportPasswordRequest(exception) {
|
||
|
|
this._passwordCapability = createPromiseCapability();
|
||
|
|
|
||
|
|
if (loadingTask.onPassword) {
|
||
|
|
var updatePassword = (password) => {
|
||
|
|
this._passwordCapability.resolve({
|
||
|
|
password,
|
||
|
|
});
|
||
|
|
};
|
||
|
|
loadingTask.onPassword(updatePassword, exception.code);
|
||
|
|
} else {
|
||
|
|
this._passwordCapability.reject(
|
||
|
|
new PasswordException(exception.message, exception.code));
|
||
|
|
}
|
||
|
|
return this._passwordCapability.promise;
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('PasswordException',
|
||
|
|
function transportPasswordException(exception) {
|
||
|
|
loadingTask._capability.reject(
|
||
|
|
new PasswordException(exception.message, exception.code));
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('InvalidPDF', function transportInvalidPDF(exception) {
|
||
|
|
this.loadingTask._capability.reject(
|
||
|
|
new InvalidPDFException(exception.message));
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('MissingPDF', function transportMissingPDF(exception) {
|
||
|
|
this.loadingTask._capability.reject(
|
||
|
|
new MissingPDFException(exception.message));
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('UnexpectedResponse',
|
||
|
|
function transportUnexpectedResponse(exception) {
|
||
|
|
this.loadingTask._capability.reject(
|
||
|
|
new UnexpectedResponseException(exception.message, exception.status));
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('UnknownError',
|
||
|
|
function transportUnknownError(exception) {
|
||
|
|
this.loadingTask._capability.reject(
|
||
|
|
new UnknownErrorException(exception.message, exception.details));
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('DataLoaded', function transportPage(data) {
|
||
|
|
this.downloadInfoCapability.resolve(data);
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('PDFManagerReady', function transportPage(data) {
|
||
|
|
if (this.pdfDataRangeTransport) {
|
||
|
|
this.pdfDataRangeTransport.transportReady();
|
||
|
|
}
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('StartRenderPage', function transportRender(data) {
|
||
|
|
if (this.destroyed) {
|
||
|
|
return; // Ignore any pending requests if the worker was terminated.
|
||
|
|
}
|
||
|
|
var page = this.pageCache[data.pageIndex];
|
||
|
|
|
||
|
|
page.stats.timeEnd('Page Request');
|
||
|
|
page._startRenderPage(data.transparency, data.intent);
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('RenderPageChunk', function transportRender(data) {
|
||
|
|
if (this.destroyed) {
|
||
|
|
return; // Ignore any pending requests if the worker was terminated.
|
||
|
|
}
|
||
|
|
var page = this.pageCache[data.pageIndex];
|
||
|
|
|
||
|
|
page._renderPageChunk(data.operatorList, data.intent);
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('commonobj', function transportObj(data) {
|
||
|
|
if (this.destroyed) {
|
||
|
|
return; // Ignore any pending requests if the worker was terminated.
|
||
|
|
}
|
||
|
|
|
||
|
|
var id = data[0];
|
||
|
|
var type = data[1];
|
||
|
|
if (this.commonObjs.hasData(id)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (type) {
|
||
|
|
case 'Font':
|
||
|
|
var exportedData = data[2];
|
||
|
|
|
||
|
|
if ('error' in exportedData) {
|
||
|
|
var exportedError = exportedData.error;
|
||
|
|
warn('Error during font loading: ' + exportedError);
|
||
|
|
this.commonObjs.resolve(id, exportedError);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
var fontRegistry = null;
|
||
|
|
if (getDefaultSetting('pdfBug') && globalScope.FontInspector &&
|
||
|
|
globalScope['FontInspector'].enabled) {
|
||
|
|
fontRegistry = {
|
||
|
|
registerFont(font, url) {
|
||
|
|
globalScope['FontInspector'].fontAdded(font, url);
|
||
|
|
},
|
||
|
|
};
|
||
|
|
}
|
||
|
|
var font = new FontFaceObject(exportedData, {
|
||
|
|
isEvalSuported: getDefaultSetting('isEvalSupported'),
|
||
|
|
disableFontFace: getDefaultSetting('disableFontFace'),
|
||
|
|
fontRegistry,
|
||
|
|
});
|
||
|
|
var fontReady = (fontObjs) => {
|
||
|
|
this.commonObjs.resolve(id, font);
|
||
|
|
};
|
||
|
|
|
||
|
|
this.fontLoader.bind([font], fontReady);
|
||
|
|
break;
|
||
|
|
case 'FontPath':
|
||
|
|
this.commonObjs.resolve(id, data[2]);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
error('Got unknown common object type ' + type);
|
||
|
|
}
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('obj', function transportObj(data) {
|
||
|
|
if (this.destroyed) {
|
||
|
|
return; // Ignore any pending requests if the worker was terminated.
|
||
|
|
}
|
||
|
|
|
||
|
|
var id = data[0];
|
||
|
|
var pageIndex = data[1];
|
||
|
|
var type = data[2];
|
||
|
|
var pageProxy = this.pageCache[pageIndex];
|
||
|
|
var imageData;
|
||
|
|
if (pageProxy.objs.hasData(id)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (type) {
|
||
|
|
case 'JpegStream':
|
||
|
|
imageData = data[3];
|
||
|
|
loadJpegStream(id, imageData, pageProxy.objs);
|
||
|
|
break;
|
||
|
|
case 'Image':
|
||
|
|
imageData = data[3];
|
||
|
|
pageProxy.objs.resolve(id, imageData);
|
||
|
|
|
||
|
|
// heuristics that will allow not to store large data
|
||
|
|
var MAX_IMAGE_SIZE_TO_STORE = 8000000;
|
||
|
|
if (imageData && 'data' in imageData &&
|
||
|
|
imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) {
|
||
|
|
pageProxy.cleanupAfterRender = true;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
error('Got unknown object type ' + type);
|
||
|
|
}
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('DocProgress', function transportDocProgress(data) {
|
||
|
|
if (this.destroyed) {
|
||
|
|
return; // Ignore any pending requests if the worker was terminated.
|
||
|
|
}
|
||
|
|
|
||
|
|
var loadingTask = this.loadingTask;
|
||
|
|
if (loadingTask.onProgress) {
|
||
|
|
loadingTask.onProgress({
|
||
|
|
loaded: data.loaded,
|
||
|
|
total: data.total,
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('PageError', function transportError(data) {
|
||
|
|
if (this.destroyed) {
|
||
|
|
return; // Ignore any pending requests if the worker was terminated.
|
||
|
|
}
|
||
|
|
|
||
|
|
var page = this.pageCache[data.pageNum - 1];
|
||
|
|
var intentState = page.intentStates[data.intent];
|
||
|
|
|
||
|
|
if (intentState.displayReadyCapability) {
|
||
|
|
intentState.displayReadyCapability.reject(data.error);
|
||
|
|
} else {
|
||
|
|
error(data.error);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (intentState.operatorList) {
|
||
|
|
// Mark operator list as complete.
|
||
|
|
intentState.operatorList.lastChunk = true;
|
||
|
|
for (var i = 0; i < intentState.renderTasks.length; i++) {
|
||
|
|
intentState.renderTasks[i].operatorListChanged();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('UnsupportedFeature',
|
||
|
|
function transportUnsupportedFeature(data) {
|
||
|
|
if (this.destroyed) {
|
||
|
|
return; // Ignore any pending requests if the worker was terminated.
|
||
|
|
}
|
||
|
|
var featureId = data.featureId;
|
||
|
|
var loadingTask = this.loadingTask;
|
||
|
|
if (loadingTask.onUnsupportedFeature) {
|
||
|
|
loadingTask.onUnsupportedFeature(featureId);
|
||
|
|
}
|
||
|
|
_UnsupportedManager.notify(featureId);
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('JpegDecode', function(data) {
|
||
|
|
if (this.destroyed) {
|
||
|
|
return Promise.reject(new Error('Worker was destroyed'));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeof document === 'undefined') {
|
||
|
|
// Make sure that this code is not executing in node.js, as
|
||
|
|
// it's using DOM image, and there is no library to support that.
|
||
|
|
return Promise.reject(new Error('"document" is not defined.'));
|
||
|
|
}
|
||
|
|
|
||
|
|
var imageUrl = data[0];
|
||
|
|
var components = data[1];
|
||
|
|
if (components !== 3 && components !== 1) {
|
||
|
|
return Promise.reject(
|
||
|
|
new Error('Only 3 components or 1 component can be returned'));
|
||
|
|
}
|
||
|
|
|
||
|
|
return new Promise(function (resolve, reject) {
|
||
|
|
var img = new Image();
|
||
|
|
img.onload = function () {
|
||
|
|
var width = img.width;
|
||
|
|
var height = img.height;
|
||
|
|
var size = width * height;
|
||
|
|
var rgbaLength = size * 4;
|
||
|
|
var buf = new Uint8Array(size * components);
|
||
|
|
var tmpCanvas = document.createElement('canvas');
|
||
|
|
tmpCanvas.width = width;
|
||
|
|
tmpCanvas.height = height;
|
||
|
|
var tmpCtx = tmpCanvas.getContext('2d');
|
||
|
|
tmpCtx.drawImage(img, 0, 0);
|
||
|
|
var data = tmpCtx.getImageData(0, 0, width, height).data;
|
||
|
|
var i, j;
|
||
|
|
|
||
|
|
if (components === 3) {
|
||
|
|
for (i = 0, j = 0; i < rgbaLength; i += 4, j += 3) {
|
||
|
|
buf[j] = data[i];
|
||
|
|
buf[j + 1] = data[i + 1];
|
||
|
|
buf[j + 2] = data[i + 2];
|
||
|
|
}
|
||
|
|
} else if (components === 1) {
|
||
|
|
for (i = 0, j = 0; i < rgbaLength; i += 4, j++) {
|
||
|
|
buf[j] = data[i];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
resolve({ data: buf, width, height, });
|
||
|
|
};
|
||
|
|
img.onerror = function () {
|
||
|
|
reject(new Error('JpegDecode failed to load image'));
|
||
|
|
};
|
||
|
|
img.src = imageUrl;
|
||
|
|
});
|
||
|
|
}, this);
|
||
|
|
|
||
|
|
messageHandler.on('FetchBuiltInCMap', function (data) {
|
||
|
|
if (this.destroyed) {
|
||
|
|
return Promise.reject(new Error('Worker was destroyed'));
|
||
|
|
}
|
||
|
|
return this.CMapReaderFactory.fetch({
|
||
|
|
name: data.name,
|
||
|
|
});
|
||
|
|
}, this);
|
||
|
|
},
|
||
|
|
|
||
|
|
getData: function WorkerTransport_getData() {
|
||
|
|
return this.messageHandler.sendWithPromise('GetData', null);
|
||
|
|
},
|
||
|
|
|
||
|
|
getPage: function WorkerTransport_getPage(pageNumber, capability) {
|
||
|
|
if (!isInt(pageNumber) || pageNumber <= 0 || pageNumber > this.numPages) {
|
||
|
|
return Promise.reject(new Error('Invalid page request'));
|
||
|
|
}
|
||
|
|
|
||
|
|
var pageIndex = pageNumber - 1;
|
||
|
|
if (pageIndex in this.pagePromises) {
|
||
|
|
return this.pagePromises[pageIndex];
|
||
|
|
}
|
||
|
|
var promise = this.messageHandler.sendWithPromise('GetPage', {
|
||
|
|
pageIndex,
|
||
|
|
}).then((pageInfo) => {
|
||
|
|
if (this.destroyed) {
|
||
|
|
throw new Error('Transport destroyed');
|
||
|
|
}
|
||
|
|
var page = new PDFPageProxy(pageIndex, pageInfo, this);
|
||
|
|
this.pageCache[pageIndex] = page;
|
||
|
|
return page;
|
||
|
|
});
|
||
|
|
this.pagePromises[pageIndex] = promise;
|
||
|
|
return promise;
|
||
|
|
},
|
||
|
|
|
||
|
|
getPageIndex: function WorkerTransport_getPageIndexByRef(ref) {
|
||
|
|
return this.messageHandler.sendWithPromise('GetPageIndex', {
|
||
|
|
ref,
|
||
|
|
}).catch(function (reason) {
|
||
|
|
return Promise.reject(new Error(reason));
|
||
|
|
});
|
||
|
|
},
|
||
|
|
|
||
|
|
getAnnotations: function WorkerTransport_getAnnotations(pageIndex, intent) {
|
||
|
|
return this.messageHandler.sendWithPromise('GetAnnotations', {
|
||
|
|
pageIndex,
|
||
|
|
intent,
|
||
|
|
});
|
||
|
|
},
|
||
|
|
|
||
|
|
getDestinations: function WorkerTransport_getDestinations() {
|
||
|
|
return this.messageHandler.sendWithPromise('GetDestinations', null);
|
||
|
|
},
|
||
|
|
|
||
|
|
getDestination: function WorkerTransport_getDestination(id) {
|
||
|
|
return this.messageHandler.sendWithPromise('GetDestination', {
|
||
|
|
id,
|
||
|
|
});
|
||
|
|
},
|
||
|
|
|
||
|
|
getPageLabels: function WorkerTransport_getPageLabels() {
|
||
|
|
return this.messageHandler.sendWithPromise('GetPageLabels', null);
|
||
|
|
},
|
||
|
|
|
||
|
|
getAttachments: function WorkerTransport_getAttachments() {
|
||
|
|
return this.messageHandler.sendWithPromise('GetAttachments', null);
|
||
|
|
},
|
||
|
|
|
||
|
|
getJavaScript: function WorkerTransport_getJavaScript() {
|
||
|
|
return this.messageHandler.sendWithPromise('GetJavaScript', null);
|
||
|
|
},
|
||
|
|
|
||
|
|
getOutline: function WorkerTransport_getOutline() {
|
||
|
|
return this.messageHandler.sendWithPromise('GetOutline', null);
|
||
|
|
},
|
||
|
|
|
||
|
|
getMetadata: function WorkerTransport_getMetadata() {
|
||
|
|
return this.messageHandler.sendWithPromise('GetMetadata', null).
|
||
|
|
then(function transportMetadata(results) {
|
||
|
|
return {
|
||
|
|
info: results[0],
|
||
|
|
metadata: (results[1] ? new Metadata(results[1]) : null),
|
||
|
|
};
|
||
|
|
});
|
||
|
|
},
|
||
|
|
|
||
|
|
getStats: function WorkerTransport_getStats() {
|
||
|
|
return this.messageHandler.sendWithPromise('GetStats', null);
|
||
|
|
},
|
||
|
|
|
||
|
|
startCleanup: function WorkerTransport_startCleanup() {
|
||
|
|
this.messageHandler.sendWithPromise('Cleanup', null).then(() => {
|
||
|
|
for (var i = 0, ii = this.pageCache.length; i < ii; i++) {
|
||
|
|
var page = this.pageCache[i];
|
||
|
|
if (page) {
|
||
|
|
page.cleanup();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
this.commonObjs.clear();
|
||
|
|
this.fontLoader.clear();
|
||
|
|
});
|
||
|
|
},
|
||
|
|
};
|
||
|
|
return WorkerTransport;
|
||
|
|
|
||
|
|
})();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A PDF document and page is built of many objects. E.g. there are objects
|
||
|
|
* for fonts, images, rendering code and such. These objects might get processed
|
||
|
|
* inside of a worker. The `PDFObjects` implements some basic functions to
|
||
|
|
* manage these objects.
|
||
|
|
* @ignore
|
||
|
|
*/
|
||
|
|
var PDFObjects = (function PDFObjectsClosure() {
|
||
|
|
function PDFObjects() {
|
||
|
|
this.objs = Object.create(null);
|
||
|
|
}
|
||
|
|
|
||
|
|
PDFObjects.prototype = {
|
||
|
|
/**
|
||
|
|
* Internal function.
|
||
|
|
* Ensures there is an object defined for `objId`.
|
||
|
|
*/
|
||
|
|
ensureObj: function PDFObjects_ensureObj(objId) {
|
||
|
|
if (this.objs[objId]) {
|
||
|
|
return this.objs[objId];
|
||
|
|
}
|
||
|
|
|
||
|
|
var obj = {
|
||
|
|
capability: createPromiseCapability(),
|
||
|
|
data: null,
|
||
|
|
resolved: false,
|
||
|
|
};
|
||
|
|
this.objs[objId] = obj;
|
||
|
|
|
||
|
|
return obj;
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* If called *without* callback, this returns the data of `objId` but the
|
||
|
|
* object needs to be resolved. If it isn't, this function throws.
|
||
|
|
*
|
||
|
|
* If called *with* a callback, the callback is called with the data of the
|
||
|
|
* object once the object is resolved. That means, if you call this
|
||
|
|
* function and the object is already resolved, the callback gets called
|
||
|
|
* right away.
|
||
|
|
*/
|
||
|
|
get: function PDFObjects_get(objId, callback) {
|
||
|
|
// If there is a callback, then the get can be async and the object is
|
||
|
|
// not required to be resolved right now
|
||
|
|
if (callback) {
|
||
|
|
this.ensureObj(objId).capability.promise.then(callback);
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
// If there isn't a callback, the user expects to get the resolved data
|
||
|
|
// directly.
|
||
|
|
var obj = this.objs[objId];
|
||
|
|
|
||
|
|
// If there isn't an object yet or the object isn't resolved, then the
|
||
|
|
// data isn't ready yet!
|
||
|
|
if (!obj || !obj.resolved) {
|
||
|
|
error('Requesting object that isn\'t resolved yet ' + objId);
|
||
|
|
}
|
||
|
|
|
||
|
|
return obj.data;
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Resolves the object `objId` with optional `data`.
|
||
|
|
*/
|
||
|
|
resolve: function PDFObjects_resolve(objId, data) {
|
||
|
|
var obj = this.ensureObj(objId);
|
||
|
|
|
||
|
|
obj.resolved = true;
|
||
|
|
obj.data = data;
|
||
|
|
obj.capability.resolve(data);
|
||
|
|
},
|
||
|
|
|
||
|
|
isResolved: function PDFObjects_isResolved(objId) {
|
||
|
|
var objs = this.objs;
|
||
|
|
|
||
|
|
if (!objs[objId]) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
return objs[objId].resolved;
|
||
|
|
},
|
||
|
|
|
||
|
|
hasData: function PDFObjects_hasData(objId) {
|
||
|
|
return this.isResolved(objId);
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the data of `objId` if object exists, null otherwise.
|
||
|
|
*/
|
||
|
|
getData: function PDFObjects_getData(objId) {
|
||
|
|
var objs = this.objs;
|
||
|
|
if (!objs[objId] || !objs[objId].resolved) {
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
return objs[objId].data;
|
||
|
|
},
|
||
|
|
|
||
|
|
clear: function PDFObjects_clear() {
|
||
|
|
this.objs = Object.create(null);
|
||
|
|
},
|
||
|
|
};
|
||
|
|
return PDFObjects;
|
||
|
|
})();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Allows controlling of the rendering tasks.
|
||
|
|
* @class
|
||
|
|
* @alias RenderTask
|
||
|
|
*/
|
||
|
|
var RenderTask = (function RenderTaskClosure() {
|
||
|
|
function RenderTask(internalRenderTask) {
|
||
|
|
this._internalRenderTask = internalRenderTask;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Callback for incremental rendering -- a function that will be called
|
||
|
|
* each time the rendering is paused. To continue rendering call the
|
||
|
|
* function that is the first argument to the callback.
|
||
|
|
* @type {function}
|
||
|
|
*/
|
||
|
|
this.onContinue = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
RenderTask.prototype = /** @lends RenderTask.prototype */ {
|
||
|
|
/**
|
||
|
|
* Promise for rendering task completion.
|
||
|
|
* @return {Promise}
|
||
|
|
*/
|
||
|
|
get promise() {
|
||
|
|
return this._internalRenderTask.capability.promise;
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Cancels the rendering task. If the task is currently rendering it will
|
||
|
|
* not be cancelled until graphics pauses with a timeout. The promise that
|
||
|
|
* this object extends will be rejected when cancelled.
|
||
|
|
*/
|
||
|
|
cancel: function RenderTask_cancel() {
|
||
|
|
this._internalRenderTask.cancel();
|
||
|
|
},
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Registers callbacks to indicate the rendering task completion.
|
||
|
|
*
|
||
|
|
* @param {function} onFulfilled The callback for the rendering completion.
|
||
|
|
* @param {function} onRejected The callback for the rendering failure.
|
||
|
|
* @return {Promise} A promise that is resolved after the onFulfilled or
|
||
|
|
* onRejected callback.
|
||
|
|
*/
|
||
|
|
then: function RenderTask_then(onFulfilled, onRejected) {
|
||
|
|
return this.promise.then.apply(this.promise, arguments);
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
return RenderTask;
|
||
|
|
})();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* For internal use only.
|
||
|
|
* @ignore
|
||
|
|
*/
|
||
|
|
var InternalRenderTask = (function InternalRenderTaskClosure() {
|
||
|
|
|
||
|
|
function InternalRenderTask(callback, params, objs, commonObjs, operatorList,
|
||
|
|
pageNumber, canvasFactory) {
|
||
|
|
this.callback = callback;
|
||
|
|
this.params = params;
|
||
|
|
this.objs = objs;
|
||
|
|
this.commonObjs = commonObjs;
|
||
|
|
this.operatorListIdx = null;
|
||
|
|
this.operatorList = operatorList;
|
||
|
|
this.pageNumber = pageNumber;
|
||
|
|
this.canvasFactory = canvasFactory;
|
||
|
|
this.running = false;
|
||
|
|
this.graphicsReadyCallback = null;
|
||
|
|
this.graphicsReady = false;
|
||
|
|
this.useRequestAnimationFrame = false;
|
||
|
|
this.cancelled = false;
|
||
|
|
this.capability = createPromiseCapability();
|
||
|
|
this.task = new RenderTask(this);
|
||
|
|
// caching this-bound methods
|
||
|
|
this._continueBound = this._continue.bind(this);
|
||
|
|
this._scheduleNextBound = this._scheduleNext.bind(this);
|
||
|
|
this._nextBound = this._next.bind(this);
|
||
|
|
}
|
||
|
|
|
||
|
|
InternalRenderTask.prototype = {
|
||
|
|
|
||
|
|
initializeGraphics:
|
||
|
|
function InternalRenderTask_initializeGraphics(transparency) {
|
||
|
|
|
||
|
|
if (this.cancelled) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (getDefaultSetting('pdfBug') && globalScope.StepperManager &&
|
||
|
|
globalScope.StepperManager.enabled) {
|
||
|
|
this.stepper = globalScope.StepperManager.create(this.pageNumber - 1);
|
||
|
|
this.stepper.init(this.operatorList);
|
||
|
|
this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint();
|
||
|
|
}
|
||
|
|
|
||
|
|
var params = this.params;
|
||
|
|
this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs,
|
||
|
|
this.objs, this.canvasFactory,
|
||
|
|
params.imageLayer);
|
||
|
|
|
||
|
|
this.gfx.beginDrawing({
|
||
|
|
transform: params.transform,
|
||
|
|
viewport: params.viewport,
|
||
|
|
transparency,
|
||
|
|
background: params.background,
|
||
|
|
});
|
||
|
|
this.operatorListIdx = 0;
|
||
|
|
this.graphicsReady = true;
|
||
|
|
if (this.graphicsReadyCallback) {
|
||
|
|
this.graphicsReadyCallback();
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
cancel: function InternalRenderTask_cancel() {
|
||
|
|
this.running = false;
|
||
|
|
this.cancelled = true;
|
||
|
|
|
||
|
|
if ((typeof PDFJSDev !== 'undefined' && PDFJSDev.test('PDFJS_NEXT')) ||
|
||
|
|
getDefaultSetting('pdfjsNext')) {
|
||
|
|
this.callback(new RenderingCancelledException(
|
||
|
|
'Rendering cancelled, page ' + this.pageNumber, 'canvas'));
|
||
|
|
} else {
|
||
|
|
this.callback('cancelled');
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
operatorListChanged: function InternalRenderTask_operatorListChanged() {
|
||
|
|
if (!this.graphicsReady) {
|
||
|
|
if (!this.graphicsReadyCallback) {
|
||
|
|
this.graphicsReadyCallback = this._continueBound;
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (this.stepper) {
|
||
|
|
this.stepper.updateOperatorList(this.operatorList);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (this.running) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
this._continue();
|
||
|
|
},
|
||
|
|
|
||
|
|
_continue: function InternalRenderTask__continue() {
|
||
|
|
this.running = true;
|
||
|
|
if (this.cancelled) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (this.task.onContinue) {
|
||
|
|
this.task.onContinue(this._scheduleNextBound);
|
||
|
|
} else {
|
||
|
|
this._scheduleNext();
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_scheduleNext: function InternalRenderTask__scheduleNext() {
|
||
|
|
if (this.useRequestAnimationFrame && typeof window !== 'undefined') {
|
||
|
|
window.requestAnimationFrame(this._nextBound);
|
||
|
|
} else {
|
||
|
|
Promise.resolve(undefined).then(this._nextBound);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
_next: function InternalRenderTask__next() {
|
||
|
|
if (this.cancelled) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList,
|
||
|
|
this.operatorListIdx,
|
||
|
|
this._continueBound,
|
||
|
|
this.stepper);
|
||
|
|
if (this.operatorListIdx === this.operatorList.argsArray.length) {
|
||
|
|
this.running = false;
|
||
|
|
if (this.operatorList.lastChunk) {
|
||
|
|
this.gfx.endDrawing();
|
||
|
|
this.callback();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
return InternalRenderTask;
|
||
|
|
})();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* (Deprecated) Global observer of unsupported feature usages. Use
|
||
|
|
* onUnsupportedFeature callback of the {PDFDocumentLoadingTask} instance.
|
||
|
|
*/
|
||
|
|
var _UnsupportedManager = (function UnsupportedManagerClosure() {
|
||
|
|
var listeners = [];
|
||
|
|
return {
|
||
|
|
listen(cb) {
|
||
|
|
deprecated('Global UnsupportedManager.listen is used: ' +
|
||
|
|
' use PDFDocumentLoadingTask.onUnsupportedFeature instead');
|
||
|
|
listeners.push(cb);
|
||
|
|
},
|
||
|
|
notify(featureId) {
|
||
|
|
for (var i = 0, ii = listeners.length; i < ii; i++) {
|
||
|
|
listeners[i](featureId);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
};
|
||
|
|
})();
|
||
|
|
|
||
|
|
var version, build;
|
||
|
|
if (typeof PDFJSDev !== 'undefined') {
|
||
|
|
version = PDFJSDev.eval('BUNDLE_VERSION');
|
||
|
|
build = PDFJSDev.eval('BUNDLE_BUILD');
|
||
|
|
}
|
||
|
|
|
||
|
|
export {
|
||
|
|
getDocument,
|
||
|
|
LoopbackPort,
|
||
|
|
PDFDataRangeTransport,
|
||
|
|
PDFWorker,
|
||
|
|
PDFDocumentProxy,
|
||
|
|
PDFPageProxy,
|
||
|
|
_UnsupportedManager,
|
||
|
|
version,
|
||
|
|
build,
|
||
|
|
};
|
||
|
|
</code></pre>
|
||
|
|
</article>
|
||
|
|
</section>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<nav>
|
||
|
|
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.4.3</a> on Mon Jun 12 2017 08:43:32 GMT+0000 (Coordinated Universal Time)
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